import React, { Component } from 'react';
class Example extends Component {
  constructor(props) {
    super(props);
    this.state = { count: 0 }
  }
  render() { 
    return ( 
      <div>
        <p>You clicked {this.state.count}</p>
        <button onClick={this.addCount.bind(this)}>Click me</button>
      </div>
     );
  }
  addCount(){
    this.setState({ count: this.state.count + 1 });
  }
}
 
export default Example;